Quelle ShardingKey.java Sprache: JAVA

/*
* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
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*/
package java.sql;

/**
* Interface used to indicate that this object represents a Sharding Key. A
* {@code ShardingKey} instance is only guaranteed to be compatible with the
* data source instance that it was derived from. A {@code ShardingKey} is
* created using {@link ShardingKeyBuilder}.
* <p>
* The following example illustrates the use of {@link ShardingKeyBuilder} to
* create a {@code ShardingKey}:
* <pre>
* {@code
*
*     DataSource ds = new MyDataSource();
*     ShardingKey shardingKey = ds.createShardingKeyBuilder()
*                           .subkey("abc", JDBCType.VARCHAR)
*                           .subkey(94002, JDBCType.INTEGER)
*                           .build();
* }
* </pre>
* <p>
*
* A {@code ShardingKey} may also be used for specifying a
* {@code superShardingKey}. Databases that support composite Sharding may use a
* {@code superShardingKey} to specify a additional level of partitioning within
* the Shard.
* <p>
* The following example illustrates the use of {@link ShardingKeyBuilder} to
* create a {@code superShardingKey} for an eastern region with a
* {@code ShardingKey} specified for the Pittsburgh branch office:
* <pre>
* {@code
*
*     DataSource ds = new MyDataSource();
*     ShardingKey superShardingKey = ds.createShardingKeyBuilder()
*                           .subkey("EASTERN_REGION", JDBCType.VARCHAR)
*                           .build();
*     ShardingKey shardingKey = ds.createShardingKeyBuilder()
*                           .subkey("PITTSBURGH_BRANCH", JDBCType.VARCHAR)
*                           .build();
*     Connection con = ds.createConnectionBuilder()
*                           .superShardingKey(superShardingKey)
*                           .shardingKey(shardingKey)
*                           .build();
* }
* </pre>
*
* @since 9
*/
public interface ShardingKey {

}

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